This is the 278th most frequent Korean word.
배우
Actor; actress.
The word '배우' in this context refers to an 'actor' and is used as a noun.
그 배우는 정말 유명하다.
That actor is really famous.
Here, '배우' again is used as a noun meaning 'actor' in a descriptive context.
이 영화에서 배우는 중요한 역할을 맡았다.
In this movie, the actor took on an important role.
The word '배우' means 'to learn' in this context, used as a verb.